From the collection Dr. David P. Chandler on the site http://papaintellivision.com/
The documents herein regard the Mattel Electronics Intellivision project ranging from its inception in 1977 until the end of Chandler's involvement with the company in 1983.
This document is an eight page engineering decision memo initiated by John Lishman issued June 25th, 1981. It concerns changes to the Intellivision Keyboard component, showing a revised parts list for production. On the last page of the document it notes that the “Initial Release” of the Keyboard component was stamped as November 2nd, 1979.
Uploaded by The History of How We Play on